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RS Ophiuchi is "Currently" Shining at a apparent magnitude of 5.12 (initially 4.6.) . It is fading at a rate of 0.01 and continues this progress for the next 43-47 days. Then it will fade at a rate of 0.02 and reaches its pre-burst luminosity with apparent magnitude of 10 to 12. Usually binoculars (take 8x42) will be able to spot this with ...


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In a nova, a layer of hydrogen is pulled from a regular star, forming a kind of dense atmosphere around the white dwarf. This atmosphere is heated by the white dwarf, until a critical temperature is reached, and fusion begins in the atmosphere. The white dwarf is rather unaffected by this, and the process of forming a hydrogen atmosphere can restart. ...


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I have at least a partial answer to your question: I'm doubtful that 2C 1406 corresponds to IC 4606, given the listed flux density. IC 4606 is an HII region, rather than a supernova remnant, and knowing the Antares system I feel confident saying it also doesn't correspond to Needham's claimed supernova. I don't know what 2C 1406 actually is, although my bet ...


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Part of the fun of variables stars is watching them fade or brighten and have an idea of the magnitude of the variable. The AAVSO (American Association of Variable Star Observers) website can create custom plots of variable stars. See AAVSO Variable Star Plotter. Here is a binocular-friendly chart I made for RS Oph. (The numbers are the visual magnitudes ...


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Pretty useful website is spaceweather.com. It features an archive, which is available here for August 9, 2021, when they published an article about the nova. Right before the 'Update' section there are 3 star charts, one of them being the one @JohnHoltz posted. Skymaps: simple, detailed, really detailed I found it following these arrows: Ophiuchus is pretty ...


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You could generate one with Stellarium. Using the tools in the top right you can create a "telescope" with the right field of view. I used one with a 50mm diameter, and a focal length of 210mm, with the standard Ocular #0, and I turned off the vertical and horizontal "flip". This gives a field of view of 8.2 degrees The bright star in ...


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